ComfySeat Furniture is a brand reputed for its wide variants of sofas that introduced a new range of mattresses and bed frames a few years ago. Since most of its products could be produced using the same resources and technology, the company's cost structure lowered, while its product portfolio widened. In this scenario, which of the following value and cost drivers is ComfySeat applying? Group of answer choices network effect learning-curve effect economies of scope mass customization